Does his model correctly show why the properties of the ending substances are different from the properties of the starting substances?

first one is the correct answer

idk i’m struggling too

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.